I totally support samples, however, I think that many of us are interested in these rebarreling projects that are going on and those doing them should, if they can make it, bring their samples-along with a bottle of what they started with, to the KBF in Sept. Then we can all see how these are working, as I'm sure that more than one of us is waiting to see some results before we take the plunge ourselves.I will send you a sample when it is finished and re-bottled.
As far as the finishing with other spirits, while I've seen great success in this domain with scotch, I've been less than thrilled with the results I've seen in bourbon so far. It may be that they didn't use a bourbon that could handle the finish or that they were mismatched-I've had Port, Cognac, and Mesquite finishes. However I would be interested to see more as I think this could work, I just haven't had one yet that did. I would like to see one done with calvados, for some reason this just works in my head(though it may be horrible) but I see it either as a very short term finish or an extremely long term finish, the middle ground (which is what I expect I've tasted so far) just doesn't seem to work.
Either way best of luck and I hope you can make it to KY for the Fest with samples of your results.